Post-mold.



J. J. & P. A. LORENZ.

POST MOLD.

APPLICATION FILED APB..20, 1911.

Patented Nov. 17, 1914.

Jade

Jacafi Jiamzz JACOB J. LORENZ AND PETER A. LORENZ, CHICAGO, ILLINOIS;

POST-MOLD.

Application filed April 20, 1911. Serial No. 622,247.

To all whom it may concern:

Be it known that we, J ACOB J. LORENZ and PETER A. LORENZ, citizens ofthe United States, residing at Chicago, in the county of Cook and Stateof Illinois, have invented certain new and useful Improvements inPost-Molds, of which the following is a specification. I

This invention contemplates an improved post mold by which a post may bemolded in the position which it is to occupy in use, that is to say,with its lower end seated in a post hole in the earth.

One of the objects of this'invention is *to' produce a mold of thischaracter, which is simple in construction and light in weight so thatit may be readily transported from one post hole to another in buildinga fence.

Another object is to provide a mold which may be formed of sheet metaland which will stand rigidly when in position above a post hole.

A further object is to produce an expansible mold having improved meansfor expanding the same so that the moldmay be readily removed from thepost when completed.

Other objects and advantages of the invention will be specifically setforth in the following description. 1 v

In the accompanying drawings, Figure 1 is a side elevation of a postmold embodying the features of our invention. Fig. 2 is a verticalcentral section throu h the mold and concrete material therein. *ig. 3is a section on line 3-3 of Fig. 2. Fig. 4 is an enlarged horizontalsection showing the mold expanded and ready to be removed from thecompleted post.

The mold is preferably formed entirely of sheet metal so that it will belight in weight and easily transported. The body 5 con sists of anintegral piece of metal of tubular form and tapering toward its upperend.

To the lower end of the body 5 is secured a base portion 6, whichpreferably comprises a flat plate having a circular opening 7 therein toreceive the tube, said plate being formed in two separate halves asshown in Fig; 3, and having downwardly turned flanges 8 at its edgesadapted to be sunk into the earth to steady the mold. The body 5 may besecured to the base 6 in any suitable way as by means of an annularflange 9 at the lower end of the body which vertically sliding said bar.

Specification of Letters latent. PatntedNov lm 1914,:

is secured to the under side of the base 6 at the edge of the opening 7A suitable number of diagonal braces 10 may be employed to give rigidityand staj-" bility to the mold. WVe consider the base portion 6 animportant part of thedevice because it serves to hold the mold firmlyand rigidly in its operative position above the post hole.

The body 5 has a longitudinalslot 11 running from end to end thereof soas to render the body expansi-ble and compressible toper;

mit its being removed from the'p ostupon the completion of the latter.

The metalat opposite edges of the slot 11. is bent backwardlyupon theexterior of the mold to form outstanding flanges 12 for attaching theexpanding and contracting means. Said means preferably comprises a bar13 adapted to lie in contact with the flanges 12 at the edges of theslot 11, said bar having a plurality of pairs of cam slot-s 14E therein.Pairs of pins 15 fixed in the'flanges 12 extend outwardly through thecam slots 14 and have suitable heads 16 thereon overlying said slots atthe outer face of the bar 13.

17 is a handle attached to the bar 13 for In this vertical movement thepins 15 are caused by the cam slots 14: to move toward and away fromeach other and thus expand and contract the mold.

As shown in Fig. 3 the slot 11 in the mold body registers with the slotformed between the halves of the base plate 6, so that the base platedoes not interfere with the expansion and contraction of the mold.

In order to facilitate the placing of concrete in the upper endof themold body 5 funnel member 18 may be provided, said member comprising aflaring portion .19 and a sleeve 20 adapted to fit into the. upper endof the body 5. I

21 is an annular rib formed in the sleeve 20 near its lower end.

ess, the post hole 22 is dug and a place surposition shown in Fig. l, isthen placed above the post hole and in register theresol with, the baseplate 6 resting upon said leveled portion and the flanges 8 of said baseplate being sunk into the earth to steady the mold. If it is desired toreinforce the post In molding a post according to our proca suitablenumber of reinforcing wires or bars 23 may be placed within the mold andthe post hole 22, the upper ends of said bars being spaced from the moldby means of the rib 21 on the funnel sleeve 20. Concrete may now beintroduced into the mold at the upper end to fill the post hole and themold, the concrete being tamped from time to time during the fillingoperation. \Vhen the mold has been filled substantially to the heightindicated in Fig. 2, the funnel member 18 may be Withdrawn andadditional material placed in the mold to completely fill the same.After the concrete has set suf ficiently, the bar 13 will be slid bymeans of the handle 17 to cause the pins 15 to separate and therebyexpand the mold as shown in Fig. 4: whereupon the mold may be withdrawnup o-fi the post.

In building a fence several molds would preferably be used, some of themolds being filled while the concrete in the others is set ting.

lVe claim as our invention:

A post mold comprising an expansible tubular body portion, and a funnelmember including a neck portion arranged to fit in the upper end of saidbody portion, said neck portion having an inwardly extending annular ribthereon for the purpose described.

In testimony whereof we hereunto afliX our signatures in the presence oftwo witnesses.

JACOB J. LORENZ. PETER A. LORENZ.

WVitnesses:

PERoY Gr. I-IINKLEY, ALLEAN FALAHEE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). 0.

